While that sounds user friendly and genuinely useful, to me it's acceptable collateral damage in order to stop the rampant abuse by ad networks. As a user I'm a

While that sounds user friendly and genuinely useful, to me it's acceptable collateral damage in order to stop the rampant abuse by ad networks. As a user I'm also not sure it's a huge loss, since at least the browsers I use can auto-fill addresses and credit cards.